I am building an antique reproduction cherry hall table.  I prepared the top of the table (25″ X 52″) from 4 boards of different widths  (chamfered slightly along the length of the boards) that I glued up with biscuits.  I would prefer not to make breadboard ends for aesthetic reasons.  How much of a problem is warping of the wood and, if it is, what other techniques will help overcome the tendency to warp.  I was considering little wood blocks screwed into the underside of the table top and anchored into slots on the inside of the front and sides (the way Norm does it).  I was also considering two or three battens on the underside of the  top screwed through oversized holes to allow for seasonal movement.  I would welcome your opinions.  Thanks.  Howard